Although legal autonomy remains a pending issue in the political system of the Province of Buenos Aires, Argentina, economic aspects can also strongly condition it. In this work we will address the economic limitations to the autonomy of the municipalities through the increasing quantity of funds that the Province gives with specific assignation in theirs Budgets. We will identify the complex network of provincial norms that limit their economic competences and, consequently, decision-making capabilities. Either because they force or condition the direction of the funds, these types of regulations affect the powers, local public policies and capacities of municipal authorities. We conclude that the distribution criteria show great differences and strongly affect small municipalities with low collection capacity.